<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./index.css">
</head>
<body>
  <ul id="container">
    <li class="li-item" draggable="true">1</li>
    <li class="li-item" draggable="true">2</li>
    <li class="li-item" draggable="true">3</li>
    <li class="li-item" draggable="true">4</li>
    <li class="li-item" draggable="true">5</li>
  </ul>
  <script src="./flip.js"></script>
  <script src="./drag_order.js"></script>
</body>
</html>